Hub brake



Sept. l24, 1940. s. B. KURZINA. JR 2,215,965

HUB BRAKE Filed April 27. 1959 2 Sheets-Sheet l `ll E IN f ENTOR.

S429tl 24, 1940- s. B. KuRzlNA. JR 2,215,955

HUB BRAKE Filed April 27. 1939 2 Sheets-Shea?l 2 IN VENTOR` 'Y 5 A @zii Jl." u

Patented Sept. 24, 1940 Vllwrlelli"r OFI-fics The present invention relat brake for bicycles or-the like.

It is an object of 'thepresent invention to'pro? 51 vide a novel coaster brake which' is`` strong and light in construction and reliable and eicientiii operation. f y f It is another objecttoprovide such a device incorporating an expansible sleevebrake'rwith 10` novel anchoring and 'operating'meansv therefor. It is another object tcprovide'fsuchadevice in which the Wheel hub-is formed and'supported It is a further object toprovide such` 'adevice '151 embodying novel means fiori-controlling" the brake and drive clutch. j

It is another object to provide such a' device Which is arranged -OreaSyaSSembly-and acl-l' view thereof frol'nftheA vright perspective of 301, certainv of the elements of thebrakefstructreim disassembled relation, somewof the partsfbeing broken away to show their .internal construction;

' Fig. 4 is a side ,elevation'partlyin sectionof a second embodiment of the invention;

35v Fig. 5 is an end view of theistructure'shown in.

Fig. 4 from the right'in Fig. 4;v

Fig. 6 is a detail partly. in sideelevationand partly in section of a ithird embodiment of the invention;

40 Fig. 'l is an end vievv from the right `ofgthe structure shown in Fig. 6;V

Fig. 8 is a vdetail partly-in tside elevationand" partly in section 'of another'embodimentfbf the invention; and l f f` 5 Fig. 9 isfa view similaru to'iFig. 8 cfa further embodiment of the invention.v

In Figs; 1, 2 and 3 thereis illustrated acoaster brake structure comprising an axlel adapted to be mounted in th'e forks of a vehicle `such 'asa' ends for the reception "of clamping nutS.-#^A'n anchor sleeve 2 of double-D cross-lsection'is' having an opening 4 conforming therewith fixed 551: thereto in anyl suitable manner las byrbrazing as bearings 1.

'frictionf-'bearings- I2 on a bearingA cone bicycle, knot illustrated," yami threaaegll "onibethisclaims. (cl. 19a- 6) e to aY hub'brake' for velocipedes and more` partici'llarly to= aI coaster indicated at 5. A bearing cup 6 is loosely mounted on the anchor sleeve 2 adjacent the' torque arm 3 and-is arrangedto receive anti-friction A driving member 8 comprising a screwshaft 9 and a body portion forming a bearingcup Illr formed integrally therewith or brazed thereto as indicated at II',is` journalled by means of anti- I3 threaded on vthe end of `the axle opposite the torque arm 3. 'I'he bearnggcone I3 is provided with a peripheral shoulder I3a anda cylindrical hub I3b."' The bearing cup portion I0 'of driving member 8 'is provided'with a cylindrical 'extension I 0a overlying the cone h ub. A closure inember I3c for the bearing 'ismounted on Vthe cone hub having a running fit Within the cylindrical extension -IIla and confined' thereon against thev in any suitable manner as by brazing on the cone hub and provided with a vflattened or non-circular periphery as `shown in Fig.' 2 in'order to vshoulder l3a by an adjusting collar A13d fixedr receive a Wrench or Spanner to adjust the bearing.

The screw shaft 9 has acylindrical internal bearing surface I4 piloted `on the inner end of a reduced portion I 5 of the anchor sleeve 2.

AA bearing cup I Gand a cup-shaped mounting member I1 `are Vfixed asby Welding orbrazing on the periphery of the driving member in nestedrelation against a shoulder I8 1th"er eo n. Bearing cup- I6 ris arrangedto receive anti''fric tionfbeari'ng members i9. Mounting member |11 is "provided With peripheral longitudinally.' ar, ranged slots 2I adapted tov receive inwardly e x 1 tendinglugs 22 of asprocket 23 so asto key the sprocket onthemounting member. A' split ring 24 is mounted in a circumferential groove 25 in the periphery vof the mountingmemberll to retain the sprocket against` 'shoulders j 26 on themountingimemberll engaging 'the Sides of the sprocket lugs 22.` j .j 1 A Wheel hub 21 is provided'vvith 'bearingcones- 28 and 2 9 ,at its ends non-rotatably connected thereto as by'rneans o f lugs 3I` and 32 entering notches y33 and 34 respectively in. the ends of' the hub member. [Cones 128 and; 23 are arranged to cooperate with the`l r`l ea l.ring members ,1 and.

I9 to rotatably support the hub...

Spoke flanges 35 and V36 are,non-rotatably,y

longitudinal slots 38 extending alternately from each end thereof and terminating in pear-shaped openings 4| adjacent the opposite ends. Means for expanding the brake sleeve and anchoring one end thereof is provided comprising a thimble 42 loosely mounted in the end of the brake sleeve and having expanding wedges 43 and 44 xed thereto or formed integrally therewith in position to enter a pair of opposite slots '39 in the brake sleeve.A Thimble42 is provided on one side with teeth 45 arranged to engage with teeth 46 on an anchor block 41 having a double-l D opening 48 adapted to t the anchor sleeve 2 and prevent rotation of thimble 42 thereon.

Means for retaining the thimblel 42 in the end of the brake sleeve are provided' in the form of wire retaining members 49 adapted to seat extending into the pear-shaped openin'g's'lll in the brake sleeve.-`

flhe expanding means for the brake sleeve 38 further includes a supporting, and actuating member 53 in the formof a nut threaded on the screw shaft9 and retained in the opposite end of the lbrake sleeve from the thimble 42 by means of wire retainers 54 seated incircumferential groove 55 in the periphery of the nut 53 and having outturned ends 56 entering the pearshaped openings 4| `inythat end of the brake sleeve. .Nut 53 is .provided `with wedges 51 and 58 xed thereto or-v formed integrally'therewith, which wedges are arranged to enter the ends ofslots '59;and. cooperate with wedges 43 and 44 on thimble 42 to expand the sleeve into engagement with the interior vof the hub 21 when the nut53 is moved to theleft in Fig. 1.

`Means for driving the hub 21 in a forward direction from the driving member 8 is providedin the form of apair of arcuate clutch members 62| Qa'nd 62.r mounted within the hub adjacent the bearing cone 29,. v and having beveled ends 63 adaptedto be engaged by wedges 51 and 58 when the nut" 53 .moves to the right in Fig. 1 so as to expand 'the 'clutch' rings against Athe interior of the hub Aandlockfthe hub to the driving member.

Means 'for normally maintaining the teeth 45 and"46 of thimble 42` and anchor vblock 41 out of engagement and for applying a light frictional drag to the brake sleeve during the-initiationof "thebraking operation, is provided in the form of` a knurled washer 64" having a double-D opening |55l conforming to the reduced portion Il of the anchor` sleeve 2, and pressed against a the adjacent end of the thimble 42 by means of a light'spring l66 seated in a counterbore 61 in the anchorv block 41.

In` the operation of this embodiment of the invention, forward rotation of the sprocket 23 causes rotation of thedriving member-8 whereby the screw shaft 9 causes nut 53 to move to the right in Fig. 1, lexpanding the clutch members 6| and. 62 against the interior of the hub by means of the wedges 51 and.58 whereby thehub is locked tor-the" driving memberand caused to rotate therewith. Upon cessation of rotation of the reet-111,45 on] .the thimble with the .teeth Itl on the anchor block 41 whereby the brake sleeve is prevented from rotation. Further backward movement of sprocket 23 causes the nut 53 to move farther to the. left, thus expanding the brake sleeve 38 by means of wedges 51, 58, 43 and 44 whereby the sleeve is brought into frictional contact with the interior of the hub to retard its rotation.v Upon release of the sprocket 23, the 'elasticity of the brake sleeve 38 and spring 66 causes the parts to return to their normal positions as illustrated in Fig. l.

In the embodiment of the invention illustrated in Figs. 4 and 5, the elements of the hub brake are similar to those previously described and are similarly numbered. In this case, however, the sprocket 23` is'Y mounted on a combined bearing cup' and kmounting member 68 rigidly mounted on thedrive member 8 as by brazing against the shoulder |8.

[The mounting'and bearing member 68 is providedjwit-h longitudinal grooves 69 in its periphery-and withareduced portion 1| on which the sprocket 23 is mounted. Sprocket 23 is retained against a shoulder 12 formed by said reduced portion 'lybymeans-of a split lock ring 13 seated in a circumferential groove 14 in the periphery of the support member 68.

' The operation of this embodiment of the invention isthesame as that previously described.

Figs.- r6, '1,.8 and 9 show further optional sprocket'mounting arrangements. i In Figs. 6 and 7 the driving member is--in the` Aform of a sleeve receiving the end of the screw shaft 9, expanded at its outer endand notched as indicated at 16 toreceive-inwardlyextending lugs 1-1 of sprocket 18. A bearing cup 19 is rotatably mounted within the sleeve .15 in position tocooperate with the axle bearings |2 and has radially extending spring lugs 8|, oneor more of ,which has a detent protuberance V82 arranged to enter a depression 83 in the sprocket. 'Sprocket 18 isv provided with openings 84 of Y,sufficient depth to permit the passage of the sprocket over the lugs 8| YA bearing cup 85 is xed on lthe periphery of the sleeve 15wbywelding or brazing, in position to cooperate with the hub bearing members .|9.

Inj mountingrthe sprocket 18 on the driving member, the openings 84 in the' sprocket are broughtinto registry with thelugs 8| of bearing ,cup,19..y The sprocket Ais then passed over the lugs 8| and onto the end of the driving member 15Y upagainst theouter-.bearing cup 85, the'lugs 1-11;ofthe sprocket entering the notches .16 of the driving zmember.' The inner bearing cup 19 isthen rotated to lplacethe lugs 18| out of registry with the openings 84 yso as vto lock the sprocket :on ithedriving member, in which position the bearing cup is retained by lmeans of the detent 82, 83. i

-I n the embodimentpf the invention illustrated in Fig. 8 the driving member 86 is formed interiorly as a bearing cup for the axle bearings |2 and haszmounted thereon a bearing cup 81 brazed or welded thereto as indicated at 88 andarranged to cooperate with fhub bearings `I9. Bearing cup 81 is provided with a seat 8.9 for a sprocket 6|, which seat isy notched -to receive inwardly extending lugs of the sprocket. A split lock ring 92 seatedin v a'circumferential groove93 in the periphery-ofdriving member 86 serves to retain sprocket 9 on the bearing cupand mounting member 81. v

, In the structure illustrated in Fig. y9 driving member 94 f-is'formediinteriorly as a bearing cupwtofrecjeive :theiaxle fbearings |12 land is `pro- 75;

vided with a lperipheralfseat for a sprocket 95, thel seatland sprocketybeing formed with keying lugs and recesses. ...A s'fhere*illustrated,` driving member 94 isformedwitha reduced smoothportion .96A adjacent, the seatfor the sprocket 95,

and a bearing cup 91 is fixed thereon as by welding or brazing. A retaining ring 98 having interior notchesfconforming to thelugs of the sprocket seat, is vmounted between the ends of said lugs and the bearing cup 9'|,beii'ig rotated so as to place its notches out of registry with the lugs on the driving member and so retained as by means of a screw 99 traversing the sprocket 95 and ring 98.

Inmounting 'the' sprocket in this embodiment of the invention, the lock ring 98 is first slid on the driving member 911 and-then rotated to place the notches in the lock ring out o-f registry with the lugs on the driving member. is then slid on the driving memberuagainst the lock ring and retained by means of a screw or screws 99.

Although certain embodiments of the invention have been shown and described in detail, it will be understood that other embodiments are possible and various changes may be made in the design and arrangements of the parts without departing from the spirit of the invention as defined in lthe claims appended hereto.

What is claimed is:

1. In a coaster brake, a fixed anchor sleeve, an anchor clutch block slidably vbut non-rotatably mounted thereon, a torque arm xed to the anchor sleeve serving as an abutment to conne 'the anchor clutch block thereon, a brake support ring slidably journalled on the anchor sleeve have ing a clutch face adapted to cooperate with the anchor block,` yielding lmeans normally holding the clutch members separated, a driving member having a screw shaft piloted on the anchor sleeve, an actuating member threaded on the screw shaft, an expansible brake sleeve mounted on the support ring and actuating member, and a wheel hub journalled on the anchor sleeve and driving member, said brake support ring and actuating member having means for expanding the brake sleeve into engagement with the hub responsive to compression of the parts between the actuating member and anchor block by backward rotation of the driving member.

2.' In a coaster brake, a xed anchor sleeve, an

anchor clutch block non-rotatably mounted thereon, altorque arm xed to the anchor sleeve serving as an abutment to confine the anchor clutch block thereon, a bearing cup mounted onl the anchor sleeve between the anchor block and torque arm, a brake support ring slidably journalled on the vanchor sleeve having a clutch face adapted to cooperate with the anchor clutch block, a driving. member having a screw shaft piloted on the anchor sleeve, a bearing cup xed on the driving member, an actuating member Sprocket 95.

and'bearing on the nested cups having lugs seated in saidfnotches,l and thrust means preventing longitudinalmovementof the sprocket. 4. In ac'oaster brake,'a driving member having'a peripheral shoulder, a mounting cup fixed on the driving member against said shoulder, a bearingcup nested inthe mounting cup and fixed tothe drivingl member, said mounting cup having longitudinally extending peripheral notches, a drive sprocket on'the mounting cuphaving lugs seated in' said notches, and removable thrust means confining the sprocket on the vmounting member. n f

"5.' In a bicycle hub,` anaxle, a bearing cone threaded y thereon having a cylindrical hub, a driving member having a bearing cup journalled on the cone with a hollow cylindrical `extension overlying the cone hub, a bearing closure .mem-

ber on the cone hub, and an adjusting collar having a noncircular contour fixed on the cone hub and confining the bearing closure member there- 6. In a bicycle hub, an axle, a bearing cone threaded thereon having a shoulder and a cylindrical hub extending axially therefrom, .a driving member having a bearing cup journalled on the cone with a hollow cylindrical extension overlying the cone hub, a bearing closure member on the cone hub inthe form of a disc having a running fit in the extension of thedriving member, and an adjusting collar having a noncircular contour fixed on the cone hub and confining the bearing closure member thereon against said shoulder.

7. In a coaster brake, an anchor sleeve, a driving member coaxial therewith, an actuating member threaded on the driving member, a brake supporting ring journalled on the anchor sleeve, an expansible brake cylinder mounted at its ends on the actuating member and supporting ring, and retaining means'swiveled'on the actuating member and supporting ringy and having pivotal connection with theV brake cylinder.

8. In a coaster brake, an anchor sleeve, a drivingr member coaxial therewith, an actuating member threaded on the driving member, a brake supporting ring journalled on the anchor sleeve, a brake cylinder mounted at its ends on the actuating member and supporting ring, said brake cylinder having diametrically arranged overlapping lorigitudinal slots extending from each end to permit radi-al expansion thereof, said 'actuating member and supporting ring having peripheral grooves, and retaining wires seated in said grooves and extending intothe ends of said slots.

9. In a coaster brake, a driving member including a screw shaft, a collar xed thereto, a wheel hub, means including a bearing member xed on the periphery ofthe collar journalling the'hub on the driving member, a sprocket splined on the collar in abutting relation to the bearing member, and aninternal bearing member in the collar provided with means for holding the sprocket o-n the collar.

10. In a coaster brake, a driving member including a screw shaft, a collar fixed thereto, a wheel hub, means including a bearing member iixed on the periphery of the collar journalling the hub on the driving member, a sprocket splined on thebearing member, said bearing member having a circumferential shoulder abutting the sprocket, and lock means seated in the collar retaining the sprocket on the bearing member.

11. In a `coaster brake, an axle, an anchor sleeve adjustably mounted thereon, an. anchor 75 anchor block toward the torque arm, a bearing cup loosely mounted on the anchor sleeve between the anchor block and torque arm, a bearing cup journalled .on the axle, and a cylindrical hub barrel having bearing cones at its ends rotatably mounted in the bearing cups.

13. In a coaster brake for velocipedes and the like, an axle, an anchor sleeve mounted thereon, an anchor block splined on the sleeve, an anchor arm lXecl to the sleeve serving as an abutment to dene the axial position of the block on the Sleeve, a wheel hub surrounding the sleeve and block, a bearing member in the end of the hub, and a cooperating bearing member rotatably mounted on the sleeve and confined between the anchor arm and block. 

